External opening of human excretory system.
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The kidneys remove from the blood the nitrogenous wastes such as urea, as well as salts and excess water, and excrete them in the form of urine. ... The urine collected in the bladder is passed into the external environment from the body through an opening called the urethra.
Answered by
1
Answer:
The kidneys remove from the blood the nitrogenous wastes such as urea, as well as salts and excess water, and excrete them in the form of urine. ... The urine collected in the bladder is passed into the external environment from the body through an opening called the urethra.
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